Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 11, 2025
Propene,
used
on
a
large
scale
to
manufacture
polypropylene
and
several
commodity
chemicals,
is
increasingly
produced
by
catalytic
propane
dehydrogenation
(PDH).
Atomically
dispersed
Pt
has
emerged
as
promising
candidate
catalyst
for
PDH;
however,
stabilizing
atomically
at
high
temperatures
challenging.
Here,
we
demonstrate
the
use
of
dealuminated
zeolite
beta
with
Fe
content
host
isolated
Pt,
which
anchored
strongly
support
Pt-Fe
bonds.
The
sites
exhibit
PDH
performance,
including
apparent
forward
rate
coefficient
propene
formation
(404.8-26.4
mol
propene/mol
Pt·bar·s)
selectivity
(≥96%)
823
K
in
presence
H2.
Kinetics
data
characterizing
range
loadings
show
that
catalyzes
rates
independent
H2
partial
pressure,
whereas
metallic
clusters,
formed
loadings,
catalyze
reaction
slightly
negative
dependence
pressure.
shift
speciation
loading,
confirmed
infrared
spectroscopy
adsorbed
CO,
X-ray
absorption
spectroscopy,
high-angle
angular
dark
field
scanning
transmission
electron
microscopy,
suggests
observed
change
kinetics
dispersion
consequence
mechanism.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(45), С. 30966 - 30975
Опубликована: Окт. 30, 2024
Improving
the
use
of
platinum
in
propane
dehydrogenation
catalysts
is
a
crucial
aspect
to
increasing
efficiency
and
sustainability
propylene
production.
A
known
practiced
strategy
involves
incorporating
more
abundant
metals
supported
catalysts,
its
activity
stability
while
decreasing
overall
loading.
Here,
using
colloidal
techniques
control
size
composition
active
phase,
we
show
that
Pt/Cu
alloy
nanoparticles
on
alumina
(Pt/Cu/Al
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 8, 2024
Abstract
The
oxidative
dehydrogenation
of
propane
using
CO
2
(CO
‐ODH)
technology
has
broad
application
prospects
in
the
production
propylene
and
utilization
,
development
efficient
‐ODH
catalysts
is
great
significance.
However,
it
remains
a
challenge
to
develop
highly
catalyst
that
can
activate
both
C─H
C═O.
Herein,
PtZn/Co@S‐1
with
very
low
precious
metal
content
0.2
wt.%
reported.
Benefiting
from
PtZn
4
nanoclusters
dispersed
on
surface
Silicalite‐1
zeolite
tetrahedrally
coordinated
Co
2+
framework
via
relay
catalysis,
independent
dual
sites
structure
(PtZn/Co@S‐1)
greatly
promotes
reaction
high
conversion
rate
C
3
H
8
(59.7%)
(44.3%),
selectivity
94.9%,
thus
upsetting
equilibrium
for
direct
propane.
Experimental
measurements
density
functional
theory
calculations
suggest
interfaces
are
likely
carbon
dioxide
hydrogenation
active
respectively.
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 11, 2025
Propene,
used
on
a
large
scale
to
manufacture
polypropylene
and
several
commodity
chemicals,
is
increasingly
produced
by
catalytic
propane
dehydrogenation
(PDH).
Atomically
dispersed
Pt
has
emerged
as
promising
candidate
catalyst
for
PDH;
however,
stabilizing
atomically
at
high
temperatures
challenging.
Here,
we
demonstrate
the
use
of
dealuminated
zeolite
beta
with
Fe
content
host
isolated
Pt,
which
anchored
strongly
support
Pt-Fe
bonds.
The
sites
exhibit
PDH
performance,
including
apparent
forward
rate
coefficient
propene
formation
(404.8-26.4
mol
propene/mol
Pt·bar·s)
selectivity
(≥96%)
823
K
in
presence
H2.
Kinetics
data
characterizing
range
loadings
show
that
catalyzes
rates
independent
H2
partial
pressure,
whereas
metallic
clusters,
formed
loadings,
catalyze
reaction
slightly
negative
dependence
pressure.
shift
speciation
loading,
confirmed
infrared
spectroscopy
adsorbed
CO,
X-ray
absorption
spectroscopy,
high-angle
angular
dark
field
scanning
transmission
electron
microscopy,
suggests
observed
change
kinetics
dispersion
consequence
mechanism.
